CN108479329A - A kind of method and device promoting plasma desulfuration denitration - Google Patents
A kind of method and device promoting plasma desulfuration denitration Download PDFInfo
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- CN108479329A CN108479329A CN201810369040.1A CN201810369040A CN108479329A CN 108479329 A CN108479329 A CN 108479329A CN 201810369040 A CN201810369040 A CN 201810369040A CN 108479329 A CN108479329 A CN 108479329A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/60—Simultaneously removing sulfur oxides and nitrogen oxides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/96—Regeneration, reactivation or recycling of reactants
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/20—Reductants
- B01D2251/206—Ammonium compounds
- B01D2251/2062—Ammonia
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/80—Employing electric, magnetic, electromagnetic or wave energy, or particle radiation
- B01D2259/818—Employing electrical discharges or the generation of a plasma
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Abstract
The present invention provides a kind of method and devices promoting plasma desulfuration denitration, belong to stack gases Treatment process field.The problems such as it, which solves the multiple pollutant in existing flue gas, cannot be carried out at the same time removal effect, and desulfurization off sulfide effect is not thorough.The present invention includes plasma reactor, upper circulation water case, lower cyclic water tank and supporting rack, it is communicated with inlet air stack on upper circulation water case, it is communicated with outlet flue on lower cyclic water tank, it is connected to by circulation line between upper circulation water case and lower cyclic water tank, plasma reactor includes collecting terminal and corona wire, collecting terminal is in open column shape, is vertically arranged and upper and lower ends are connected to upper circulation water case and lower cyclic water tank respectively, and corona wire is arranged in collecting terminal.The advantage of the invention is that the discharge electrode of corona wire is more, improves capacity usage ratio and improve the removal efficiency of pollutant, electrode sheet structure is simple, and process velocity is fast, and cost is lower.
Description
Technical field
The invention belongs to stack gases Treatment process fields, are related to the removal of pollutant in flue gas, more particularly to a kind of rush
Into the method and device of plasma desulfuration denitration.
Background technology
As society is constantly progressive development, increasingly raising of the public to environmental quality requirement in recent years, government is to pollutant
Emission control it is also increasingly stringent.Atmosphere pollution is the closest with human body health relationship, is carved to the improvement of atmosphere pollution
Do not allow to delay.Environment Protect in China industry association exists《Desulphurization denitration industry development Overview in 2015》It mentions, China's atmosphere pollution shape
Improvement situation is presented but still extremely serious in condition, therefore air contaminant treatment is still the most important thing.In 16 years development Overviews then
It mentions, existing desulphurization denitration technology homogeneity is more serious, leads to excess capacity, therefore unfinished meet higher environmental protection standard and want
It asks, needs upgrading exploitation new technology.And plasma technique is since to be applicable in flue gas category wide for it, and can be simultaneously to a variety of
Pollutant is removed, and is attracted attention and is increasingly promoted in recent years, and the new selection of desulphurization denitration industry can be become.
Plasma technique application is widely studied, such as medical industry, spraying industry, material modification, object
The common method that the plasmas such as quality detection and contaminant degradation generate is excited between non-touching electrode using high pressure,
The active particle with high-energy such as negative ions, electronics, photon, excited atom or molecule is generated, these active particles are logical
It crosses and oxidation or directly degradation is carried out to pollutant, in conjunction with means such as absorptions, to achieve the purpose that eliminate pollution.
Domestic and international plasma degradation of contaminant has more research, but is all directed to going for Single Pollution object mostly
Place's research, therefore removing sulfuldioxide has good development prospect while multiple pollutant.
Invention content
First purpose of the present invention is the above problem being directed to present in existing desulfuring and denitrifying apparatus, and proposes one
Kind can remove the device of various pollutants in fume.
First purpose of the present invention can be realized by following technical proposal：
A kind of device promoting plasma desulfuration denitration, including plasma reactor, upper circulation water case, lower recirculated water
Case and supporting rack, upper circulation water case, plasma reactor and lower cyclic water tank are fixed at supporting rack successively from top to down
On, which is characterized in that it is communicated with inlet air stack on the upper circulation water case, outlet flue is communicated on lower cyclic water tank, on
It is connected to by circulation line between cyclic water tank and lower cyclic water tank, water pump is set on circulation line, be used for lower cyclic water tank
Interior circulation fluid is promoted in upper circulation water case, and plasma reactor includes collecting terminal and corona wire, and collecting terminal is in open tubular column
Shape, is vertically arranged and upper and lower ends are connected to upper circulation water case and lower cyclic water tank respectively, and corona wire is arranged in collecting terminal.
In a kind of device of above-mentioned promotion plasma desulfuration denitration, the upper end of collecting terminal is inserted into upper circulation water case
Interior, bottom of the insertion portion beyond upper circulation water case forms an overflow height.Overflow height is for the cycle in upper circulation water case
Liquid enters from the upper orifice overflow of collecting terminal in collecting terminal, and it is suitable along the inner wall of collecting terminal and under.
In a kind of device of above-mentioned promotion plasma desulfuration denitration, the inlet air stack adds equipped with additive
Entrance.Some additives can be added from mouth is added, to promote desulphurization denitration.
In a kind of device of above-mentioned promotion plasma desulfuration denitration, the corona wire includes wire body and several electricity
Pole piece, multiple electrodes piece interval are fixed in wire body, and the electrode slice is in gear-like, and periphery has multiple uniform intervals
The blunt point angle of distribution, above-mentioned wire body sequentially pass through the center of each electrode slice.
In a kind of device of above-mentioned promotion plasma desulfuration denitration, the plasma reactor further includes
Ion power supply, anode and the corona wire of plasma power supply are electrically connected, and cathode is electrically connected with collecting terminal, collecting terminal ground connection.
In a kind of device of above-mentioned promotion plasma desulfuration denitration, each electrode slice is equidistantly fixed at successively
In wire body.
In a kind of device of above-mentioned promotion plasma desulfuration denitration, each electrode slice is mutually parallel and place plane is equal
Perpendicular to wire body.
In a kind of device of above-mentioned promotion plasma desulfuration denitration, the tip cut at the blunt point angle forms flat
Face end.
In a kind of device of above-mentioned promotion plasma desulfuration denitration, there is a 10-15 at the blunt point angle, and adjacent two
Angle between a blunt point angle is identical.
In a kind of device of above-mentioned promotion plasma desulfuration denitration, the blunt point angle has 12, two neighboring
Angle between blunt point angle is 30 °.
In a kind of device of above-mentioned promotion plasma desulfuration denitration, the collecting terminal is cylindrical.
In a kind of device of above-mentioned promotion plasma desulfuration denitration, the wire body is hollow metal tube.
In a kind of device of above-mentioned promotion plasma desulfuration denitration, the plasma power supply is high voltagehigh frequency arteries and veins
Rush power supply.
In a kind of device of above-mentioned promotion plasma desulfuration denitration, the center opening of the electrode slice, hole it is interior
Wall forms connection veneer to electrode slice curving, which encloses the perforation passed through for above-mentioned wire body.
In a kind of device of above-mentioned promotion plasma desulfuration denitration, observation is provided at the top of the upper circulation water case
Mouthful.
Second object of the present invention is the above problem being directed to present in existing desulfuring and denitrifying apparatus, and proposes one
The method that kind can remove various pollutants in fume.
Second object of the present invention can be realized by following technical proposal：
A method of promoting plasma desulfuration denitration, which is characterized in that it includes the following steps：
S1, hydrocarbon and industrial ammonia are added into the inlet air stack being connected to plasma reactor, flue gas with
These additives uniformly mix；
S2, active material is added into circulation fluid；
The mixed gas obtained in S3, S1 enters in plasma reactor；
S4, plasma reactor work generate plasma field, and above-mentioned additive produces largely in plasma field
Living radical, in coordinated with plasma field original active particle by the pollutant being passed through in plasma reactor oxidation and
Degradation；
Ammonia in S5, ammonium hydroxide generates active particle in plasma field, and coordinated with plasma restores and pass through neutralization
It removes pollutant and absorbs the NO after oxidation2；
Dust on plasma reactor collecting terminal is washed away, while will be reacted in step S4 and S5 by S6, importing circulation fluid
Flue gas pollutant absorb, and fair current be discharged.
In a kind of method of above-mentioned promotion plasma desulfuration denitration, the hydrocarbon is propylene, acetylene
With in ethyl alcohol one kind or arbitrary several mixing.
In a kind of method of above-mentioned promotion plasma desulfuration denitration, the active material is the sub- chlorine of 2-5%
Acid sodium solution or Powdered sodium chlorite.
Compared with prior art, the method and apparatus of this promotion plasma desulfuration denitration can be to a variety of pollutions in flue gas
Object is carried out at the same time removal effect, and desulfurization off sulfide effect is thorough.The discharge electrode of corona wire is more, and corona effects are good in unit length, carry
High-energy utilization rate and the removal efficiency for improving pollutant, electrode sheet structure is simple, and process velocity is fast, and cost is lower.
Description of the drawings
Fig. 1 is the structural schematic diagram of this promotion plasma desulfuration denitrification apparatus.
Fig. 2 is the structural schematic diagram of plasma reactor.
Fig. 3 is the structural schematic diagram of wire body and electrode slice junction.
Fig. 4 is the structural schematic diagram of electrode slice.
In figure, 1, corona wire, 2, collecting terminal；3, electrode slice；4, blunt point angle；5, planar ends；6, screw rod；7, veneer is connected；
8, wire body；9, it perforates；10, upper circulation water case；11, lower cyclic water tank；12, supporting rack；13, inlet air stack；14, outlet flue；
15, water pump；16, circulation line；17, mouth is added.
Specific implementation mode
Following is a specific embodiment of the present invention in conjunction with the accompanying drawings, technical scheme of the present invention will be further described,
However, the present invention is not limited to these examples.
As shown in Figure 1, the device of this promotion plasma desulfuration denitration includes plasma reactor, upper circulation water case
10, lower cyclic water tank 11 and supporting rack 12, upper circulation water case 10, plasma reactor and lower cyclic water tank 11 from top to down according to
Secondary to be fixed on supporting rack 12, the side of the upper circulation water case 10 is communicated with inlet air stack 13, lower cyclic water tank 11
Upper end surface be communicated with outlet flue 14 straight up, pass through circulation pipe between upper circulation water case 10 and lower cyclic water tank 11
Road 16 is connected to, and water pump 15 is arranged on circulation line 16, for the circulation fluid in lower cyclic water tank 11 to be promoted to upper circulation water case
In 10.Upper circulation water case 10 and lower cyclic water tank 11 are the cuboid made of 10mm thickness stainless steel plates, the equal usage in junction
Orchid is connected, and silica gel ring is used in combination to seal.
As shown in Figure 2 or Figure 3, plasma reactor includes collecting terminal 2 and corona wire 1, high voltage high frequency bursts power supply
Anode is electrically connected with corona wire 1, and cathode is electrically connected with collecting terminal 2, and collecting terminal 2 is grounded.In the present embodiment, collecting terminal 2 is in
Cylindrical shape, is vertically arranged and upper and lower ends are connected to upper circulation water case 10 and lower cyclic water tank 11 respectively, is produced as plasma
The connecting pipe of raw area's shell and upper circulation water case 10 and lower cyclic water tank 11, the upper end of collecting terminal 2 is inserted into upper circulation water case
In 10, bottom of the insertion portion beyond upper circulation water case 10 forms an overflow height.Above-mentioned corona wire 1 is threaded through collecting terminal 2
Center, it is ensured that be not in contact with each other between corona wire 1 and collecting terminal 2, screw hole is arranged in the both ends of corona wire 1, screw rod 6 can be used to connect
It connects and is fixed in external frame.
Corona wire 1 includes wire body 8 and several electrode slices 3, and in the present embodiment, wire body 8 is hollow stainless steel tube, in pipe
Heart embroidery is no more than 0.5mm/1000mm, and electrode slice 3 is the metal disk of gear-like, and each electrode slice 3 is sequentially sleeved at line
It can be fixed on body 8 and by the forms such as welding, make that each electrode slice 3 is mutually parallel and place plane is each perpendicular to wire body 8, electricity
Spacing between pole piece 3 is equal, and can be set according to Practical Project.The center opening of electrode slice 3, the inner wall in hole is to electrode slice 3
Curving forms connection veneer 7, which encloses the perforation 9 passed through for above-mentioned wire body 8.
As shown in figure 4, the periphery of electrode slice 3 is uniformly distributed provided with multiple blunt point angles 4, the tip cut at each blunt point angle 4
Planar ends 5 are formed, the distance between two tops of planar ends 5 are 45mm, and it is in gear-like to make entire electrode slice 3.In the present embodiment,
Blunt point angle 4 has 12, and the angle between two neighboring blunt point angle 4 is 30 °.The quantity at blunt point angle 4 also can be according to different practical works
Journey is adjusted.
When 2 a diameter of 270mm of collecting terminal, the distance controlling of the end away from pole plate at 3 blunt point angle 4 of electrode slice in 85 ± 4mm, according to
Corresponding adjustment, Ke Yibao are according to using the distance of different discharge power supplies and unitary reactor diameter, corona wire 1 tip to pole plate
The injection for demonstrate,proving power supply energy ensures the intensity and uniformity of the plasma occurred.
Inlet air stack 13 is equipped with additive and mouth 17 is added, and can add some additives from mouth 17 is added, de- to promote
Sulphur denitration.Upper circulation water case 10 is in other side recirculated water interface corresponding with inlet air stack 13.It opens at the top of upper circulation water case 10
There is observation panel, sets up convenient for the installation of observation inner case and corona wire 1, closed with insulation transparent material.
Included the following steps using the method that above-mentioned apparatus carries out desulphurization denitration：
S1, added into the inlet air stack 13 being connected to plasma reactor propylene, acetylene and one kind in ethyl alcohol or
Arbitrary several mixing and penetrating industrial ammonia, flue gas are uniformly mixed with these additives；
S2, the sodium chlorite solution or Powdered sodium chlorite that 2-5% is added into circulation fluid；
The mixed gas obtained in S3, S1 enters in plasma reactor；
S4, plasma reactor introduce 40-55kV high pressures, are excited using high pressure and generate plasma field, in flue gas
Gas is generated negative ions, high energy electron, energetic atom and molecule, ground state atom and molecule and photon etc. by ionization
Six kinds of high energy active particles, above-mentioned additive produce a large amount of living radicals in plasma field, with plasma field Central Plains
Pollutant such as nitric oxide being passed through in plasma reactor etc. is aoxidized and is degraded by the reaction of some active particles, dust by
It is transferred to 2 inner wall of collecting terminal to electrostatic force；
Ammonia in S5, ammonium hydroxide generates active particle in plasma field, and coordinated with plasma restores and pass through neutralization
It removes pollutant and absorbs the NO after oxidation2；
Circulation fluid in lower cyclic water tank 11 is promoted in upper circulation water case 10 by S6, water pump 15, and circulation fluid is from collecting terminal 2
Upper end overflow enter collecting terminal 2, and go downstream, the dust on collecting terminal 2 washed away, simultaneously along 2 inner wall of collecting terminal
Circulation fluid will also react remaining oxidation product (nitrogen oxides and oxysulfide etc.) in absorption step S4 and S5, together fair current and
Under, to achieve the purpose that efficient absorption removes multiple pollutant.
Application example 1
Individually electric discharge denitration, under drying condition, NOxInitial concentration 120mg/m3, NO concentration 78mg/m3, the flow velocity of flue gas
200m3/ h, when energy injection is 1700J/L, NO conversion ratios reach 80% or more.
Application example 2
In flue gas in the ratio of propylene and NO be 1:3 amount adds propylene, under drying condition, NOxInitial concentration 120mg/
m3, NO concentration 78mg/m3, when energy injection is 1300J/L, NO conversion ratios reach 80% or more.
It should be understood that in claims of the present invention, specification, all " including ... " should be understood as open
Meaning, that is, its meaning is equal to " at least containing ... ", and should not be construed as enclosed meaning, i.e., its meaning is not answered
This is interpreted as " only including ... ".
Specific embodiment described herein is only an example for the spirit of the invention.Technology belonging to the present invention is led
The technical staff in domain can make various modifications or additions to the described embodiments or replace by a similar method
In generation, however, it does not deviate from the spirit of the invention or beyond the scope of the appended claims.
Claims (10)
1. a kind of device promoting plasma desulfuration denitration, including plasma reactor, upper circulation water case, lower cyclic water tank
And supporting rack, upper circulation water case, plasma reactor and lower cyclic water tank are fixed on supporting rack successively from top to down,
It is characterized in that, being communicated with inlet air stack on the upper circulation water case, outlet flue, upper cycle are communicated on lower cyclic water tank
It is connected to by circulation line between water tank and lower cyclic water tank, water pump is set on circulation line, being used for will be in lower cyclic water tank
Circulation fluid is promoted in upper circulation water case, and plasma reactor includes collecting terminal and corona wire, and collecting terminal is in open column shape, is erected
Directly it is arranged and upper and lower ends is connected to upper circulation water case and lower cyclic water tank respectively, corona wire is arranged in collecting terminal.
2. it is according to claim 1 it is a kind of promote plasma desulfuration denitration device, which is characterized in that collecting terminal it is upper
End is inserted into upper circulation water case, and bottom of the insertion portion beyond upper circulation water case forms an overflow height.
3. a kind of device promoting plasma desulfuration denitration according to claim 1 or 2, which is characterized in that described
Inlet air stack is equipped with additive and mouth is added.
4. a kind of device promoting plasma desulfuration denitration according to claim 1 or 2, which is characterized in that described
Corona wire includes wire body and several electrode slices, and multiple electrodes piece interval is fixed in wire body, and the electrode slice is in gear
There are multiple blunt point angles being evenly spaced on, above-mentioned wire body to sequentially pass through the center of each electrode slice for shape, periphery.
5. a kind of device promoting plasma desulfuration denitration according to claim 1 or 2, which is characterized in that described
Plasma reactor further includes plasma power supply, and anode and the corona wire of plasma power supply are electrically connected, cathode and collecting terminal
It is electrically connected, collecting terminal ground connection.
6. a kind of device promoting plasma desulfuration denitration according to claim 4, which is characterized in that the blunt point
The tip cut at angle forms planar ends.
7. a kind of device promoting plasma desulfuration denitration according to claim 4, which is characterized in that the electrode slice
Center opening, the inner wall in hole forms connection veneer to electrode slice curving, which encloses passes through for above-mentioned wire body
Perforation.
8. a kind of method promoting plasma desulfuration denitration, is realized using the device described in claim 1-7, feature exists
In it includes the following steps：
S1, hydrocarbon and industrial ammonia are added into the inlet air stack being connected to plasma reactor, flue gas and these
Additive uniformly mixes；
S2, active material is added into circulation fluid；
The mixed gas obtained in S3, S1 enters in plasma reactor；
S4, plasma reactor work generate plasma field, and above-mentioned additive produces a large amount of activity in plasma field
Free radical, the pollutant being passed through in plasma reactor is aoxidized and is dropped by original active particle in coordinated with plasma field
Solution；
Ammonia in S5, ammonium hydroxide generates active particle in plasma field, and coordinated with plasma restores and passes through to neutralize and removes
NO after pollutant and absorption oxidation2；
S6, the cigarette that the dust on plasma reactor collecting terminal is washed away, while will be reacted in step S4 and S5 by circulation fluid is imported
Gas pollutant absorbs, and fair current is discharged.
9. a kind of method promoting plasma desulfuration denitration according to claim 8, which is characterized in that described is hydrocarbon
Compound is one kind or arbitrary several mixing in propylene, acetylene and ethyl alcohol.
10. a kind of method of promotion plasma desulfuration denitration according to claim 8 or claim 9, which is characterized in that described
Active material is the sodium chlorite solution or Powdered sodium chlorite of 2-5%.
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| CN201810369040.1A CN108479329A (en) | 2018-04-23 | 2018-04-23 | A kind of method and device promoting plasma desulfuration denitration |
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| CN110115916A (en) * | 2019-01-30 | 2019-08-13 | 浙江大维高新技术股份有限公司 | The tapping equipment and technique of gas boiler flue gas |
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| CN110115916A (en) * | 2019-01-30 | 2019-08-13 | 浙江大维高新技术股份有限公司 | The tapping equipment and technique of gas boiler flue gas |
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